194 citations · 480 across the 16 of their papers we have counts for
16 papers
Is Lattice Quantum Gravity Asymptotically Safe? Making contact between Causal Dynamical Triangulations and the Functional Renormalization Group
Jan Ambjørn, Jakub Gizbert-Studnicki, Andrzej Gőrlich +1
We compare the effective action of the scale factor obtained from lattice quantum gravity (in the form of Causal Dynamical Triangulations (CDT)) to the corresponding effective acti…
Is the present acceleration of the Universe caused by merging with other universes?
Jan Ambjorn, Yoshiyuki Watabiki
We show that by allowing our Universe to merge with other universes one is lead to modified Friedmann equations that explain the present accelerated expansion of our Universe witho…
Impact of topology in causal dynamical triangulations quantum gravity
Jan Ambjorn, Zbigniew Drogosz, Jakub Gizbert-Studnicki +3
We investigate the impact of spatial topology in 3+1 dimensional causal dynamical triangulations (CDT) by performing numerical simulations with toroidal spatial topology instead of…
Renormalization Group Flow in CDT
J. Ambjorn, A. Goerlich, J. Jurkiewicz +2
We perform a first investigation of the coupling constant flow of the nonperturbative lattice model of four-dimensional quantum gravity given in terms of Causal Dynamical Triangula…
Two-Dimensional Quantum Geometry
J. Ambjorn, T. Budd
In these lectures we review our present understanding of the fractal structure of two-dimensional Euclidean quantum gravity coupled to matter.
A non-perturbative Lorentzian path integral for gravity
J. Ambjorn, J. Jurkiewicz, R. Loll
A well-defined regularized path integral for Lorentzian quantum gravity in three and four dimensions is constructed, given in terms of a sum over dynamically triangulated causal sp…